Device for twisting stay-wires.



W. P. MADSON, R. CHRISTENSON, A. INGBRETSON& W. NOWS'HIP.

DEVICE FOR TWISTING STAY WIRES.

APPLIUATION FILED FEB 5, 1912.

TINTTED sTATEs PATENT oEEIoE.

WILLIAM P. MADSON, BOY CHBISTENSON, .ALBERT INGBRETSON, AND WILLIAM NOWSHIP, OF `MILWAUKEE, WISCONSIN;

DEVICE FOIE.'I TWISTING STAY-WIRES.

Application led February 5, 1912. Serial No. 675,462. l v

fo all whom t may concern:

Be it known that we, WILLIAM P. MAD- soN, ROY CHRISTENSON, ALBERT INGBRETSON, and VILLIAM NowsHiP, citizens of the United States, residing at Milwaukee, county of Milwaukee, and State of Wisconsin, have invented new and useful Im- `provement's in Devices for Twisting StaylVires, of which the following is a specification. i

Our inventionrelates to improvements in devices for twisting stay wires with particular reference to the tie wires employed for holding together the opposing walls of concrete molds. v

The object of our invention is to provide means to facilitate twisting the wires.

In the drawings-Figure 1 is a plan view ot our improved stay wire twisting device, showing the same in position of use with reference to a concrete mold,`the walls of which are shown in section. Fig. 2 is a detail view of the wire gripping member, showing a portion of the twisting screw. Fig. 3 is a det-ail view, showing the corner of a mold and a modified form of foot piece forthe wire twisting device adapted to lit a moldl corner.

Like parts are identified by the same reference characters throughout the several views. "The supporting member comprising a head piece 1, side arms 2 diverging therefrom, and. foot pieces 3, is adapted to lit against the wall of thev mold. Thev foot pieces 3 may be` flat surfaced, as shown in Fig. 1, or they may be formed in an angle adapted to ltthe corner of a mold, as shown in. Fig. 3. The head piece 1 is provided with an aperture 4, through which passes anadjusting member 5, interiorly and eXte-.,

riorly screw-threaded and provided with a keyvchannel 6 in its outer surface, adapted to receive a. key 7, which projects inwardly into the channel 6 from the head-piece aperture. A nut 10 has threaded engagement with the exterior threads on the member 5 and a screw-threaded rod 11 extends through the member 5 and has threaded engageeach side with a gripping block 16 provided with a bearing member 17 and an eccentric member 18, the latter having an operatin handle 19. Thestay wires 20 are passed through openings in or between the planks 2l ofthe concrete mold. -These stay wires are passed aroundthe studding 22 of the mold, and the ends are gripped between the bearing member 17 and the eccentric gripping member 18. By turning the nut 10, the adjusting member 5 may 'then be moved outwardly until the stay wire is ldrawn tightly to the position in which it is illustrated in Fig. 1. Neither the member 5, nor the screw 11 will be rotated during this movement.

With the parts in the position. illustrated in Fig. l, the crank 15 may be rotated to turn the screw 11 inwardly through the member 5, thus twisting the end portions of the wire 20. The inward feed of the screvt7 11 compensates for vthe shortening of the wire during the twisting operation. This prevents the wire from breaking` or from tearing away from the gripping members. It will of course be understood that the pitch of the screw threads 11 is such that the screwwill feed inwardly in direct roportion to the shortening of the wire. the twisting operation is completed, the wire will have been twisted substantially as shown at 25 on either side of the twisting Patented Dec. 3,1912. y

device in Fig. 1. The supporting member y may be convenient-ly'secured to ythe studs 22 by swinging arms 30 and set screws 31, one of these being provided on each side of one of the foot pieces. The corner foot pieces 32 may be adjustably secured to the foot pieces `Vdriven into the woodwork.

'We claim-.-

1. V4The combination of a supporting member, an adjusting member carried thereby, mea-ns for feeding the adjusting. member inwardly and outwardly, a screw supported in a threaded bearing in the adjustingmember and independently movable therein, and a wire gripping device at the inner end of said screw.

2; The combination of an apertured supporting member provided with foot pieces adapted to bear against the wall of a concrete mold, a .tubular adjusting member hav- 'Zing y'exterior threaded engag'eine"riti-1: ii'i. A the, apertureof` the supporting member and I' keyed thereto"A to' prevent v rotation" in said aperture, a feed nut for moving'sai'd, adjustving member inwardly and outwardly, a

ment with the interior' of said adjusting 15 membexg a wire gripping device carried by said 'screw, `and operating handles for the screw and'feed nut. l

- In testimony whereof we aiix our signatures in the presence of two witnesses.

WILLIAM P. MADSON. ROY CHRISTENSON.

` ALBERT-INGBRETSON. WILLIAM NOWSI-IIP.

`Witnesses: 1 =;I.iEVERE'1'r.C. WHEELER,

` I. D.'BREMER.'

WML.. 

